Overhaul Studio controls and add image batch from one still.

Video and Image pickers, thumbwheels, aspect icons, and a Scale to MP paddle; extra prompts default to batch so each run starts from the original image.

Co-authored-by: Cursor <cursoragent@cursor.com>

utils/libraryGeneration.ts

@@ -169,7 +169,7 @@ export function stillSettingsRows(still: { width?: number; height?: number; sett
     if (settings.mode === 'refine' && settings.strength != null) {
       rows.push({ label: 'Strength', value: formatNum(settings.strength) })
     }
-    if (settings.mode !== 'generate' && settings.megapixels != null) {
+    if (settings.mode !== 'generate' && settings.scaleToTotalPixels !== false && settings.megapixels != null && settings.megapixels > 0) {
       rows.push({ label: 'Scale to MP', value: formatNum(settings.megapixels) })
     }
   } else {